Fibrous paint



Patented Jan. 17, 1928.

UNITED/STATES r 1,656,198,- PATENT- oarce.

GEORGE nnwaan min, or wnsrmsrnn, nonnomnxenm.

muons rams.

ilo Drawing. Application filed June 29, 1926, Serial Io. 119,474, and in Grcat mtain Karon 1986.

This invention relates to the preparation of a fibrous paint containing especially disintegrated paper for use as a painting medium to be applied in'the wet condition to a wall surface to serve as a substitute for wall paper.

Instead of paper, which "is the preferred fibrous material, mechanical wood pulp, spent hops, white or brown peat or moss litter, potato pulp, sugar cane pulp, esparto grass pulp, or other similar fibrous material can be used.

Sufiiciently to disintegrate paper or equivalent-fibrous material so that it willis not felt together or form lumps when spread by means of a liquid carrier on to a surface, it has hitherto been necessary to deadbeat the paper or the like in water and to utilize the scum which arises therefrom to provide the sufficiently disintegrated material.

Now I have found that by disintegrating the material in two stages, the latter stage 7 of which is effected in a high speed colloidal grinding machine or in a high speedimpact beater, the fibrous material not only can be reduced to the required degree of fineness, but the fibrous material can be so thoroughly incorporated with the binding medium and a mineral lubricant-filler, and also with coloring matter if used, that the resulting painting medium can be very thinly spread without the fibrous material felting or balling into lumps, and consequently has great covering power.- Y The invention therefore consists in subjecting fibrous material, especially paper, first to an initial disintegration and subseuently to disintegration and incorporation t erewith of a binding medium and a mineral lubricant-filler by hi 'h speed impact.

For a water paint or istemper the bind-' ing medium is a glue, for instance a dextrine gum, whereas for an oil paint the binding medium is constituted by the oil which constitutes the liquid carrier medium. The two disintegrating sta may both be wet grindin processes in w ich the pa r or the like is mixed with water and g no, oil, or a mixture of water and oil. W Alternatively the first or the second or both disintegrating stages may be efiected with the material in the dry condition. If both stages are dry grindinglstages they may be both effected in a big heater, for instance by two runs through the speed dry impact same machine, the second run being necessary to incorporate the binding medlum and filler With a dry final disintegration stage the mcorporated binding medium is glue, and the product is supplied'for admixture to with waterrfor use as an under-coat paint able wall paper lining.

he mineral lubricant-filler, such as china h clay, barytes, or gypsum, is added to the fibrous material prior to or duringthe sec- 05 0nd .final stage of disinte ation to promote the separation of the dismte ratedfibres.-

To produce a colored pro not a pigment or stain 1s added prior to or during the final dlsintegration; f 70 According to one method of rooedure,

the'paper or like fibrous material is first finely disintegrated in the dry condition and then is subsequently again disinte ated, together with 5-15 of a lubricantller, with glue and water, or with oil, or with both water and oil'which form an emulsion, and

' consequently in the wet condition.

The lubricant-filler material should be added dry to the dry und fibrous materlal before the wet grinding otherwise the resulting mixture tends to be lumpy.

The initial: dry grinding is referabl "effected in a high speed rotary d y impacli or beater mill, and t e subsequent wet 1ndas ing is carried out in a high speed co oidal beater mill. I

The resulting smooth liquid mixture 1 applled wet toa wall surfaceand on dryin serves as a wall paper substitute or w paper lining. v I a g In another method of procedure, the paper or like fibrous material is beaten up with water-to a state of extreme fineness in an I ordinary paper pulp beater whilst the glue ol the mineral filler andthe igment are mixe therewith during or su sequently to, the beating and the mixture is "subsequentl beaten and intimately mixed in a wet co loidal beater machine. The fibrous material 10! constitutes about one per cent of the solid constituents of the resulting water paint.

The subsequent beatin 1n the wet colloidal machine obviates t e initial beating being carried to. the state in which the ma- 1a terial is dead heat, whereby the period of treatment is considerably reduced.

In an alternative but somewhat less convenient method of procedure, thepaper or other fibrous material is. first beaten wet in It water to a state of extreme fineness in an ordinary paperpulp beater. Then the bulk of the molsture is expressed in a press from the beaten fibrous material and the cake is dried. Finally'tsthe' cake is broken u )to a state of powder in a high speed dryn ter machine, for example to a state of fineness such as to assthrou h a screen, the bars "of which are om 1/16 inch to 1/80 inch apart. The mineral lubricant-filler and the glue are added prior to the final drybeating and may be added during or prior to the imtlal wet beating. The product is a dry product for admixture with water as above set forth.

medium, the water ma be dried'out of the product of the initial ating, and the second stage of disintegration is then efiected in a high speed wet beater.

Linseed oil, oxidized or boiled, or an .en-

amel oil' containing copal or other resin,

may be employed in the initial beating, in

whlch case the resulting material is'lnade water-resisting.

A paint containing disintegrated fibrous material prepared-as above described, can be used for surfacing cardboard, in which case colored fibrous surfaces, either waterresisting or not, are produced.

The fibrous material may be fireproofed or mineralized either before or after dry grinding and before Wet grindin by impregnating the material with a ca cium hydrate solution and draining off the 1iqu1d and passing a. stream of C therethrough which converts the calcium hydrate into insoluble calcium carbonate, impregnating thevfiores of the materiaL- en an emulsion of oil and water is used as the liquid medium, any of the usual emulsifying agents, such as aluminium hydroxide or zinc salts, are emplo ed toretain the oil and water in the em ified condition.

By the addition of a small proportion, up to 15%, of oil or .turpentine or Venetian turpentme, or a mixture of oil and turpentine or Venetian turpentine to the water used 1n the wet-process, together with an emulsifying agent, painted with 11 water paint produced by the above describ Y process are rendered water-resistant.

I claim: y

1. A method of producing finely disintegrated fibrous paint material, especially a mixture containing finely disinte rated paper, consisting in subjecting sai material first to an initial disintegration and subse:

qtiliently to disintegration and incorporation t erewith of a binding medium and a mineral lubricant-filler by high speed impact until the fibresof said material are so broken and 'saidbroken fibres are so separated by saidmineral lubricant-filler as to. produce a .finely spreadin non-felting mixture.

2. A method 0 producing finely disintegrated fibrous paint material,-especially a mixture; containmg finely disintegrated paper, consisting in dry grindin said mate: rial by highspeed impact, ant? subsequent wet grinding and incorporating with said 1 iii-y ground material a binding medium and" a mineral'lubricant-fillerjby high speed impact intil the fibres of said material are so ,-"-broken and said broken fibres are so separated by said mineral lubricant-filler as to produce a finelyrspreadingnon-felting mixture. v

"3. A method of: producing finely disintegrated. fibrous a amixture 'contaming finely disintegrated zpaper, consisting in subjecting said material first toan initial disintegration and subsequently to disintegration and incorpor'ation therewith of a binding medium, a mineral lubricant-filler and coloring matter by high speed impact until the fibres of said material are so broken and said broken fibres are so separated by said mineral lubricant-filler as-to-produce a finely spreading non-felting-l mixture.

4. A method of producing finely disintegrated fibrous paint material, especially a mixture containin finely disintegrated paper, consisting in grindin -ter1al by high speed impact, and subsequently wet grinding and incorporating with sand dry ground material a binding medium, a mineral lubricant-filler and coloring matter by high speed impact until the fibres offsaid material are so broken and said broken fibres are-so separated by said mineral lubricant-filler as to produce a finely spreading non-felting mixture.

palnt material, especially a g said ma- In testimony whereof I have signed iny 

